PROBLEM TO BE SOLVED: To provide an instrument having a micro electrode and a micro light source to be inserted into a tissue, in particular an instrument that can be flexibly adapted to a movement in the surrounding tissue, the instrument being capable of stimulating, once inserted into a soft tissue, a single nerve cell and a nerve cell group.SOLUTION: An instrument to be installed in a soft tissue includes: a micro electrode 1402 a micro light source 1409 a strengthening element 1403 having a material that is dissoluble or resolvable in aqueous body fluid or a material that is swellable in aqueous body fluid a coating on the strengthening element that is made of a flexible and non-conductive polymer material and a base positioned at a distal end of the instrument. The flexible coating has a distal opening which leads the light emitted from the light source by collapsing, dissolving, or swelling to the outside of the instrument. There are also disclosed a medical instrument for medical treatment or medical inspection formed by an insertable instrument in the tissue, its use, and a method for installing the insertable instrument in the soft tissue.SELECTED DRAWING: Figure 15COPYRIGHT: (C)2018,JPO&INPIT【課題】組織に挿入するための微小電極及び微小光源を含む器具、特に取り巻く組織内での動きに微妙に順応することができる器具を提供し、軟質組織に挿入すると、単一の神経細胞又は神経細胞群を刺激することができる器具を提供する。【解決手段】軟質組織内に配置するための器具は、ミクロ電極1402、ミクロ光源1409、水性体液に溶解性又は分解性の材料又はかかる水性体液中で膨潤性の材料を含む強化要素1403、強化要素上の可撓性・非伝導性ポリマー材料の被膜、器具の遠位端に配置された基部を含む。可撓性被膜は、崩壊又は溶解又は膨潤により、光源から放出される光を該器具から去らせる遠位開口を有する。挿入可能な器具から組織内で形成される治療又は診断用の医療器具、その使用、及び挿入可能な器具の軟質組織内への配置方法もまた、開示される。【選択図】図15
